Post-Tufte Data Visualization

spec.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "U.S. Wind Energy Nameplate Capacity (1990-2023), Tufte-inspired revision",
  "title": {
    "text": "U.S. Wind Energy Nameplate Capacity",
    "subtitle": "Source: U.S. Energy Information Administration (EIA), Form 860 (1990-2023)"
  },
  "width": 500,
  "height": 300,
  "data": {
    "values": [
      {"year": 1990, "capacity_mw": 1980}, {"year": 1991, "capacity_mw": 2050},
      {"year": 1992, "capacity_mw": 2100}, {"year": 1993, "capacity_mw": 2200},
      {"year": 1994, "capacity_mw": 2350}, {"year": 1995, "capacity_mw": 2450},
      {"year": 1996, "capacity_mw": 2500}, {"year": 1997, "capacity_mw": 2550},
      {"year": 1998, "capacity_mw": 2650}, {"year": 1999, "capacity_mw": 4000},
      {"year": 2000, "capacity_mw": 5300}, {"year": 2001, "capacity_mw": 6700},
      {"year": 2002, "capacity_mw": 7400}, {"year": 2003, "capacity_mw": 9100},
      {"year": 2004, "capacity_mw": 11600}, {"year": 2005, "capacity_mw": 14100},
      {"year": 2006, "capacity_mw": 16800}, {"year": 2007, "capacity_mw": 25200},
      {"year": 2008, "capacity_mw": 35100}, {"year": 2009, "capacity_mw": 40300},
      {"year": 2010, "capacity_mw": 46900}, {"year": 2011, "capacity_mw": 60000},
      {"year": 2012, "capacity_mw": 71900}, {"year": 2013, "capacity_mw": 72900},
      {"year": 2014, "capacity_mw": 77700}, {"year": 2015, "capacity_mw": 86100},
      {"year": 2016, "capacity_mw": 94100}, {"year": 2017, "capacity_mw": 103600},
      {"year": 2018, "capacity_mw": 112300}, {"year": 2019, "capacity_mw": 122500},
      {"year": 2020, "capacity_mw": 139400}, {"year": 2021, "capacity_mw": 141300},
      {"year": 2022, "capacity_mw": 144200}, {"year": 2023, "capacity_mw": 147500}
    ]
  },
  "transform": [
    {
      "calculate": "toDate(datum.year + '-01-01')",
      "as": "date"
    }
  ],
  "mark": {
    "type": "line",
    "point": false,
    "color": "black"
  },
  "encoding": {
    "x": {
      "field": "date",
      "type": "temporal",
      "title": "Year",
      "axis": {
         "values": [
            {"year": 1990}, {"year": 1995}, {"year": 2000}, {"year": 2005},
            {"year": 2010}, {"year": 2015}, {"year": 2020}
          ],
        "format": "%Y",
        "grid": false,
        "ticks": true,
        "domain": false // Removed axis domain line
      }
    },
    "y": {
      "field": "capacity_mw",
      "type": "quantitative",
      "title": "Nameplate Capacity (MW)",
      "axis": {
        "titlePadding": 10,
        "grid": false,
        "ticks": true,
        "domain": false // Removed axis domain line
        }
    },
    "tooltip": [
      {"field": "date", "type": "temporal", "format": "%Y", "title": "Year"},
      {"field": "capacity_mw", "type": "quantitative", "format": ",", "title": "Capacity (MW)"}
    ]
  },
  "config": {
    "axis": {
      // General axis styling (ticks, labels, titles)
      "tickColor": "black",
      "labelColor": "black",
      "titleColor": "black",
      "labelPadding": 5
    },
     "title": {
      "color": "black",
      "subtitleColor": "black"
    },
    "legend": {"disable": true},
    "view": {"stroke": null}
  }
}